Concrete pile shell



Aug. 2, 1932. E D WATTv CONCRETE PILE SHELL Filed Sept. 26, 1929 'FIG.2.

FIGJ.

, A WJ Z 2 1l D Patented Aug. 2, 1932 UNITED sTATEs PATENTAOFFICE ELIIIU D. WATT, F LA GRANGE, ILLINOIS, ASSIG-NOR TO RAYMOND CONGRETEPILE I COMPANY, OF NEW' YORK, N. Y., A CORPORATIONOF `lSII'tTN JERSEY coNcRn'rn PILE siriani.

Application led September 26, 1929.` Seral`No. 395,255.

rlhis invention pertains to shells for concrete piles, of the kind in which a thin metallic shell is lined with waterproof material such as concrete, and in which reinforcing` ai wires are embedded in the concrete.

In previous practice the. wires have been completely embedded in the concrete shell lining so that the driving core necessarily made contact with the concrete during the l0` driving operation.

According to the present. invention the re- Y inforcing wires are only parti-ally embedded in the concrete lining so that all contact between shell and driving core Ais metal to metal instead of the inappropriate metal to concrete contact obtained in former designs.

Another object of the invention is to obtain a more intimate bond between the concrete shell and the subsequently poured con- 29 crete core than has been previously accomplished. This is possible because the wires of the shell, protruding therefrom, become partially embedded -in the concrete core of the pile,thereby providing a reinforcing interloclr between the` concrete shell and concrete core.

A further object is to provide a reinforced concrete driving shoe for the shell,`to replace the metal type of shoe previously used.

Further and other objects and advantages will be apparent from the specification and claims, and from the accompanying drawing which illustrate what is now considered the preferred embodiment of the invention.

Fig. 1 shows a concrete boot and shell ac'- co-rding to the present invention, on a collapsible driving coreready `for driving.

Fig. 2 is the same as Fig. 1 after removing the driving core and lling the shell with plastic concrete to form the concrete core.

Fig. 3 is an enlarged detail of Fig. 1.

Fig. 4; is an enlarged detail of Fig. 2.

In Fig. 1, 10 is a tapered collapsible driv ing core of familiar type, the leaves or plates of which, at their lowerk ends, are shaped to fit the interior of the driving shoe 12, which is formed of a concrete body faced on the inside and outside by thin metal casings or coating 14 and 1G, respectively. Casings 14 5G and 16 are very thin and are placed in the mold in which the concrete is poured, thereby obtaining such intimate contact between concrete and metal that the shoes have been found to be almost immune from failure by shattering, which has been a shortcoming of previous concrete shoes.

The concrete shell is built up in sections, each comprising a thin metal casing 18, a concrete body 20, and rings or coils of wire 22 partially embedded in concrete 20. As will be seen in enlarged detail view Fig. 3, there is no lContact `between driving core 10 and the concrete lining 20, the only contact of the core being with rings 22.

As is well lrnown in the art, the driving core and shell are vdriven to proper depth in the ground while arranged as in Fig. 1. The core is then removed and the shell filled with plastic concrete 24 which, when set, forms with the shell a monolithic pile structure (Fig. 2)

The enlarged detail of Fig. 4 shows how the reinforcing rings 22 are, in the finished structure, embedded partially in the concrete 20 of the shell and partially in the concrete 24 of the pile core, thereby assisting informing the bond between them.

It is to be understood that the invention is notl limited-to the specific embodiment herein illustrated and described but may be used in other forms without departure from its spirit as defined by the claims which follow.

1. A pile shell adapted for driving on a driving core, comprising in combination, a hollow monolithic concrete body and reinforcing rings arranged in spaced relationA on the inner side of said body throughout its length and having a portion thereof embedded in said concrete body and a portion eX- posed for contact with the driving core whereby the driving core is prevented from malging contact with the co-ncrete of the body, said rings held in spaced relation by sai concrete body. Y f

2. A pile'comprisingk in combination, a concrete monolithic shell, a concrete monolithic core within said shell, `and reinforcing rings partially embedded in said shell and said core, and held in spaced relation by the shell during driving and forming an interlock between said shell and core in the completed pile.

3. A driving shoe for a pile, comprising in combination, a concrete body portion and reinforcing members therefor comprising thin metal Casings on the outside and inside of said concrete body closely fitting same, substantially as described.

4. A driving shoe for: ai pile, comprising in combination, a cup-shaped concrete body and reinforcement therefor comprising a thin metal coating applied directlyT to the innerr and outer surfaces of said body.

In testimony whereof I hereto aiiix myv sign ature.

ELIHU D. WATT. 

